Hey, I've been trying to make rain, and I think I basically have the particle system right, problem is, it won't render anything. I have a static material applied to the PFlow system in particle view, but nothing shows up. Below is a screen shot in which I fit as much as I can manage. If you want specific details, just post below what you need. If you think you can help and give me your email address, I could probably email you the file as well.
~Setsanto